Map LIDs to GUIDs

In an InfiniBand fabric, the Subnet Manager and Subnet Administrator assign subnet-specific LIDs to nodes. Often in the use of the InfiniBand commands, you must provide a LID to issue a command to a particular InfiniBand device. Alternatively, the output of a command might identify InfiniBand devices by their LID.

You can create a file that is a mapping of node LIDs to node GUIDs, which can help with administrating your InfiniBand fabric. The following procedure creates a file that lists the LID in hexadecimal, the GUID in hexadecimal, and the node description.

1. Create an inventory file:

   # osmtest -f c -i inventory.txt

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   Note - The inventory.txt file can be used for other purposes too, besides this procedure.

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2. Create a mapping file:

   # cat inventory.txt |grep -e ’^lid’ -e ’port_guid’ -e ’desc’ |sed ’s/^lid/\nlid/’ > mapping.txt

3. Edit the latter half of the mapping.txt file to remove the nonessential information.

   The content of the mapping.txt file looks similar to the following:

   lid                     0x14
   port_guid               0x0021283a8620b0a0
   # node_desc             Sun DCS 72 QDR switch 1.2(LC)
    
   lid                     0x15
   port_guid               0x0021283a8620b0b0
   # node_desc             Sun DCS 72 QDR switch 1.2(LC)
    
   lid                     0x16
   port_guid               0x0021283a8620b0c0
   # node_desc             Sun DCS 72 QDR switch 1.2(LC)
   .
   .
   .

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   Note - The output in the example is just a portion of the entire file.

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Related Information

• Switch Reference, osmtest command